We offer 21 day evaluation license during which we provide free support.

我们提供了21天的评估许可，并在期间提供免费的支持。

youdao

A GPL proponent might argue that a license for free software must be upgraded periodically since we cannot anticipate what new use models for free software might be developed that restrict freedom.

GPL 的鼓吹者也许会辩解说，“自由”软件的协议必须周期性的增加严苛的改进，因为我们不能预料到会产生什么样的限制他们所谓“自由”的使用模式。

youdao

The free license of Linux allows anyone to create their own version of Linux.

Linux免费的许可让所有人都能开发他们自己的Linux版本。

youdao

Open educational resources are any type of educational materials in the public domain or released under an open-content license that allows for free use, re-use and sharing.

UNESCO: Communication and Information

According to Twitter's terms of service, the user gives Twitter a "worldwide, nonexclusive, royalty-free license" to distribute tweets in any medium, even those that don't exist yet.

CNN: Heather Kelly,

By making available any Member Content through the Site, Application or Services, you hereby grant to Cold Brew Labs a worldwide, irrevocable, perpetual, non-exclusive, transferable, royalty-free license, with the right to sublicense, to use, copy, adapt, modify, distribute, license, sell, transfer, publicly display, publicly perform, transmit, stream, broadcast, access, view, and otherwise exploit such Member Content only on, through or by means of the Site, Application or Services.

FORBES: Pinterest Revises "Terrifying" Terms of Service, Soon To Release Private Pinboards and API